diff --git a/core/modules/field_ui/lib/Drupal/field_ui/Form/FieldInstanceEditForm.php b/core/modules/field_ui/lib/Drupal/field_ui/Form/FieldInstanceEditForm.php
index f922875..3122417 100644
--- a/core/modules/field_ui/lib/Drupal/field_ui/Form/FieldInstanceEditForm.php
+++ b/core/modules/field_ui/lib/Drupal/field_ui/Form/FieldInstanceEditForm.php
@@ -145,7 +145,7 @@ public function buildForm(array $form, array &$form_state, FieldInstance $field_
     );
 
     // Add additional field instance settings from the field module.
-    $additions = \Drupal::moduleHandler->invoke($field['module'], 'field_instance_settings_form', array($field, $this->instance, $form_state));
+    $additions = \Drupal::moduleHandler()->invoke($field['module'], 'field_instance_settings_form', array($field, $this->instance, $form_state));
     if (is_array($additions)) {
       $form['instance']['settings'] = $additions;
       $form['instance']['settings']['#weight'] = 10;
diff --git a/core/modules/field_ui/lib/Drupal/field_ui/Form/FieldSettingsForm.php b/core/modules/field_ui/lib/Drupal/field_ui/Form/FieldSettingsForm.php
index c3f575d..c610eda 100644
--- a/core/modules/field_ui/lib/Drupal/field_ui/Form/FieldSettingsForm.php
+++ b/core/modules/field_ui/lib/Drupal/field_ui/Form/FieldSettingsForm.php
@@ -102,7 +102,7 @@ public function buildForm(array $form, array &$form_state, FieldInstance $field_
     $form['field']['settings'] = array(
       '#weight' => 10,
     );
-    $additions = \Drupal::moduleHandler->invoke($field['module'], 'field_settings_form', array($field, $this->instance, $has_data));
+    $additions = \Drupal::moduleHandler()->invoke($field['module'], 'field_settings_form', array($field, $this->instance, $has_data));
     if (is_array($additions)) {
       $form['field']['settings'] += $additions;
     }